I have enabled the Desktop Cube and Rotate Cube options in CompizConfig Settings Manager.

The problem I am facing is the Desktop cube is as big as the Desktop itself even though I have set the zoom level in Rotate Cube to only 0.5000.

Also the Skydome option is also not working. There is no effect on compiz when I change the Horizontal Virtual Size, Vertical Virtual Size and Number of Desktops in the Desktop Size tab of General Options.